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UNITED STATES PATENT OFFICE JAMES F. MeCOltlllIG, or MARION, IOWA, ASSIGNOR OF oxen-ALF 'ro ciLEs n; lllARTI'N,

OF SAME PLAOF.

YOOMPOSITION FOTR MARBLE ORSTONE.

I SPECIFICATION forniing part of Letters Patent No. 339,569, dated April 6,1886.

I I I Application filed August 6, i855. Serial Xo.173,7r7!'. (No specimens-l To all whom it may concern v v I Be it known that I, .TAMns 1*. MoOonMIe, a

citizen of the United States, residingat' Illa-- lion, in the county of Linn'and State of Iowa, have invented a certain new and useful Improvement in Compositions for-lllarble or Stone,'ot which the following is a specification.

My composition 'consists of the followingingredients, in about the proportions stated,

vizrconnnon quicklime, i'our pounds; mar-' ble'-dust, ten pounds; pl-ast.cr-of-paris, ten

' pounds; water lime or cement, two pounds; sulphur, two ounces; water in suflicientquantitiesto reduce the mixture to about the cousistcncy .of common mortar.

In preparing the composition, I mix the ingredients in the following manneraud order: The quickl'ime is first slackedin water, as for plastering purposes. To this I then add the marble-dust, mixing them thoroughly. I then make a cavityin the middle of the mass, and in this I mix thoroughly the plaster-ofparis and cement and the sulphur,.which has been previously cut with alcohol, Enough water is added to' admit oi" the materials being worked freely.- This second mixture is then combined-with the first, by stirring and working until the whole mass is-homogeneous, water being added, as required, to properly temper it. The composition is applied .to walls as a'plasler, or as a'plast'ic material ismoldcdinto any desired fol-111., \Vhen dry;

it has'most ol' the essential and practical quail ties olmarblc, is not injuriously affected by heater dampness, and has a llllCCl'YStill-llllt) appearance,'very closely resembling the best satisfactory results.

grades of white marble.

The proportions slat ed above are approximate only, and may be varied considerably the composition. l or ordinary purposes,however, the formula stated will be found to give The marbled-ust being the ingredient hich gives to the composition the peculiarly marble-like appearance when hardened, its place may obviouslybe supplied with some other in- ,grcdient of an analogouscharaeter, to give the composition the appearance of other kinds of stone. Thus, for examplcfior outside work in may be varied by using more or less of this ingredienfl In practice I use thecommon pulverized sulphur.

The composition, as described abo\'e,.is one that sets and hardens quite readily, but in general'may be used without any modification. \Vhen, however, considerable time is desired in which to mold the plastic material into more or less elaborate forms, something to retard the hardeningis necessary. This may be accomplished by the addition of a small quanti ty'ofcommon vinegar or molasses. Indeed, from experiments-that I have made to this end, I conclude that anything sweet or sour will answer the purpose. So, also, the same eil'eet maybe produced by the use of common glue. The quantity of any one of these ipgredieuts will begovcrned by the requirements-of each case, and need not be deft nitely stated, as the judgment of the operator variegated or mottled marble, coloring-matter of one or more shades may be added to the mass while-in a plastic state, and partially i-n- 'eorporaled therewith by stirring with a few irregular strokes. -To give it a solid color the coloring-matter is thoroughly mixed with the mass. i I

Having thus briefly described my invention, what I claim,and desire to secure by Letters Patent, is

1-. A composition for artificial marble or stone, consisting oi'limc, marble-dust, or sand or analogous substance, plasterof -paris,

cement, and sulphur,mixedtogether, with water enough. to make the mass plastic, substantiallyas specified.

' 2. A composition for artificial marble or stone,- consisting of lime, marble-dust,or sand or analogous substance, plaster of -paris; cement, and. sulphur-,made plastic and thorlOC oughly mixed in water, with coloring-mutter turd the hardening of the IIIHSS, substantially 10 partially or thoroughly mixed therewith, to as set forth. give it; a vai-iegated'or solid coloring, as de- .ID'tQStllilOHy whereof] ullix ny signature in scribed. presence of two witnesses. 5 3. A composition forertifieial marble or stone, consisting of lime, IDHI'blO-(IHSQOI sand I 1 W U or analogous materiaLplaster-ofipaiis,cement,' Witnesses. sulphur, and water, with glue, vinegar, ino- J. '1. ()XLIii', lasscs, or equivalentsubstance adapted to 10- j M. .H. ;\l.l.l-l.\'.' 

